【摘要】 在毛乌素沙地土壤盐渍化治理过程中,开展了樟子松栽培试验,分析了盐渍化程度对造林效果的影响。结果表明,随着盐渍化程度的加重,土壤水溶性盐总量、pH值以及阴离子CO32-、HCO3-、Cl-和交换性Mg2+、K+、Na+的质量分数随之升高,差异达到显著或极显著水平;轻度、中度和重度盐渍化地段的土壤含水率分别为9.38%、8.65%和5.92%,差异显著;造林保存率、林木生长量、树冠覆盖率和生产力随盐渍化程度的加重而下降,重度与轻度和中度之差存在差异显著和极显著水平。当土壤盐渍化达到重度时,樟子松的存活、生长受到明显抑制。更多还原

【Abstract】 During the process of soil salinization control in Mu Us sandy land,a cultivation experiment on Pinus sylvestris var. mongolica was carried out to analyze the effect of salinization degree on afforestation. The results showed that: with the aggravating salinization degree, total amount of water-soluble salt, pH value, anionic CO3 2-,HCO3-,Cl-and exchangeable Mg2 +,K+,Na+contents all increased,the difference was extremely significant. The moisture content of mild,moderate and severe salinization land was 9. 38 % 、8. 65 % and 5. 92 % respectively,the difference was significant. At the same time the survival rate of afforestation,forest growth, canopy cover rate and productivity decreased,the differences between severe and mild,moderate degree were significant and extremely significant. When it came to severe salinization degree,the survival and growth of Pinus sylvestris var. mongolica were significantly inhibited.更多还原